Dome and Dome Towers

I would like to say this, the dome and towers around the dome like the Fire rate boost, Range Boost, Damage Boost, DOT, and slowdown makes a big difference to the game play.
(Another part of the game i like a lot)
If you place your towers under the dome cover, all your towers get the perks from the dome and you kill the monsters real fast. Also the best way I have seen is to upgrade all the dome towers around the dome as fast as possible.
Another big plus for the dome is that monsters doing into the dome area gets to slow down like crazy with nice damage over time.

I have seen and tried different places to place the dome, what i have seen is the more towers you can get under the dome area and the more/bigger area you can cover where the monsters is/moves trough by the dome's affects the better you will do with game play.